Prevention mainly includes etiological prevention (also called primary prevention) and early diagnosis and treatment (also called secondary prevention), among which etiological prevention mainly includes:

1. Manage and improve water resources. Change the drinking water source. Gully and pond water in coastal and riverside areas contains algal toxins, which cannot be eliminated by boiling or adding tea. It is recommended to drink deep well water.

2. Manage and change food. Change the living habit of taking corn as the staple food, because it is easy to get aflatoxin after mildew.

3. Prevent hepatitis. Newborns are vaccinated with inactivated vaccine at birth.

4. others. Do not smoke or drink, and supplement selenium properly.